Water is made up of hydrogen and oxygen atoms. Oxygen is smaller than carbon and its quite heavier, and the volume of water molecules is greater than the volume of oil molecules. It makes the water thicker than gasoline. Water molecules are therefore very attracted to one another and stack quite close around each other. This is another reason why water is denser than oil. in the same way, the water has more mass than an equal volume of alcohol and therefore it must be denser.
The frictional force is oposing the force that we apply to this mass. Therefore the overall force is The second principle of physics tells us that the acceleration of a mass is direct proportional to the applied force, the mass of that object being the proportionality constant. Hence
